src/gallium/aux/tgsi/util/tgsi_transform.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
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   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
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   9  * without limitation the rights to use, copy, modify, merge, publish,
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  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
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  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
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  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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  26  **************************************************************************/
  27
  28 #ifndef TGSI_TRANSFORM_H
  29 #define TGSI_TRANSFORM_H
  30
  31
  32 #include "pipe/p_util.h"
  33 #include "pipe/p_shader_tokens.h"
  34 #include "tgsi/util/tgsi_parse.h"
  35 #include "tgsi/util/tgsi_build.h"
  36
  37
  38
  39 /**
  40  * Subclass this to add caller-specific data
  41  */
  42 struct tgsi_transform_context
  43 {
  44 /**** PUBLIC ***/
  45
  46    /**
  47     * User-defined callbacks invoked per instruction.
  48     */
  49    void (*transform_instruction)(struct tgsi_transform_context *ctx,
  50                                  struct tgsi_full_instruction *inst);
  51
  52    void (*transform_declaration)(struct tgsi_transform_context *ctx,
  53                                  struct tgsi_full_declaration *decl);
  54
  55    void (*transform_immediate)(struct tgsi_transform_context *ctx,
  56                                struct tgsi_full_immediate *imm);
  57
  58    /**
  59     * Called at end of input program to allow caller to append extra
  60     * instructions.  Return number of tokens emitted.
  61     */
  62    void (*epilog)(struct tgsi_transform_context *ctx);
  63
  64
  65 /*** PRIVATE ***/
  66
  67    /**
  68     * These are setup by tgsi_transform_shader() and cannot be overridden.
  69     * Meant to be called from in the above user callback functions.
  70     */
  71    void (*emit_instruction)(struct tgsi_transform_context *ctx,
  72                             const struct tgsi_full_instruction *inst);
  73    void (*emit_declaration)(struct tgsi_transform_context *ctx,
  74                             const struct tgsi_full_declaration *decl);
  75    void (*emit_immediate)(struct tgsi_transform_context *ctx,
  76                           const struct tgsi_full_immediate *imm);
  77
  78    struct tgsi_header *header;
  79    uint max_tokens_out;
  80    struct tgsi_token *tokens_out;
  81    uint ti;
  82 };
  83
  84
  85
  86 extern int
  87 tgsi_transform_shader(const struct tgsi_token *tokens_in,
  88                       struct tgsi_token *tokens_out,
  89                       uint max_tokens_out,
  90                       struct tgsi_transform_context *ctx);
  91
  92
  93 #endif /* TGSI_TRANSFORM_H */